What is the requirement for open source FW? As long as you get a camera that is ONVIF certified then there is no risk of lock in as it is an open standard that is compatible with most VMS software.
Best-case scenario it'll call back to the mothership, worst-case scenario it'll turn into a backdoor for your entire network and you'll start receiving ransomware threats with awkward photos/videos attached to them.
Honestly, I can kinda understand having outdoor cameras, if you're in a high crime area - but I just can't empathise with folks who feel more secure after putting indoor cameras in their own home.
thought this was going down a P Diddy route there for a second
Also, we use them for kids and cats - keep and eye and find out what happened. In fact for our one cat we heard a sound and we were able to see she fell off a desk and was hurt. So we could help her immediately.